【摘 要】
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The first stable dicentric chromosomes in maize were found in 2004.There were two sets of centromere sequences in the same chromosome but only one was activ
【机 构】
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InstituteofGeneticsandDevelopmentalBiology,ChineseAcademyofScience,Beijing,ChinaDivisionofBiological
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The first stable dicentric chromosomes in maize were found in 2004.There were two sets of centromere sequences in the same chromosome but only one was active.The silenced centromere can be transmitted to the next generation.In the case of supernumerary B chromosome centromere,we also found that function and nondisjunction are independent process.Centromere inactivation and nondisjunction provide us the new materials to study epigenetics of plant centromeres.Recently,we found many newly formed centromeres in wheat and maize without native centromeric specific sequences but with unique genomic sequences to establish de novo centromere formation.Centromere inactivation and de novo formation illustrate the epigenetic cases of centromere formation.Homologous chromosome pairing initiation requires functional centromere sites in maize and wheat.Now we are examining the molecular mechanism for centromere formation and maintenance.
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